Your supermarket shares much in common with your county fair. Roll your cart down the aisles and you’ll be assaulted by bright lights, enticing smells, and row upon row of shameless hucksterism (“9 vitamins and minerals! Everyone’s a winner!”)

hose baby changing stations found in public bathrooms often look a little suspect when it comes to cleanliness. But of all the things you might imagine would be mucking up the surface, probably cocaine didn’t cross your mind.